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Number of items: **4**.

Chajda, Ivan and Länger, Helmut:
*A representation of basic algebras by coupled right near semirings.*
Acta scientiarum mathematicarum, (81) 3-4.
pp. 361-374. (2015)

Chajda, Ivan and Krňávek, Jan and Länger, Helmut:
*Congruences on directoids.*
Acta scientiarum mathematicarum, (78) 3-4.
pp. 389-402. (2012)

Chajda, Ivan and Länger, Helmut:
*A Cayley theorem for algebras with binary and miliary operations.*
Acta scientiarum mathematicarum, (75) 1-2.
pp. 55-58. (2009)

Dorninger, Dietmar W. and Länger, Helmut:
*A formula for the solution of the difference equation : Xn+1=AX2n+BXn+C.*
Acta scientiarum mathematicarum, (47) 3-4.
pp. 487-489. (1984)